David Beckham wants to be an invisible flying superhero!

The retired soccer star admits if he could, he would love to use his hypothetical new found super power to walk through walls.

When asked what superhero power he wants in a Q&A with Belstaff, he said: "My son asks me this all the time ... What would it be? I would be invisible for the day - just to walk through ... I don't know what I'd do. Maybe fly."

However, the 40-year-old sportsman - who has sons Brooklyn, 16, Romeo, 13 and Cruz, 10 and four-year-old daughter Harper with Victoria Beckham - is glad of his international success as it allows him to promote good causes to a wider audience.

He said previously: "The Amazon was the only part of the world where I've actually not been recognised. The tribe where we visited didn't even know what football was. That kind of gave me a bit of a boost.

"Fortunately people know me as a footballer and for the last 22 years, I have been successful on the field. But my life has never just been about the football ... There's no way people can underestimate the power of what I've achieved and why I'm sitting here now with UNICEF.

"This is why what I've done over the last 22 years has been important, not just on the field but off it too. It has opened doors."